淮沭船闸闸首结构非线性有限元分析

Analysis of Nonlinear Finite Element on Huaishu Lock Structure

淮沭船闸闸首的输水廊道底板上设有空箱结构边墩,结构较为复杂,常规的解析法在计算时往往采用大量的简化假设,计算所得的值与实际值有较大的出入。为了对闸首整体结构的受力状态有一个比较全面的理解,采用三维有限元分析软件ABAQUS分析研究闸首结构在不同工况下的位移场及应力场。结果表明,淮沭船闸闸首各部件的水平位移和垂直位移均满足规范要求,虽然各工况下的拉应力均超过混凝土允许拉应力,但各混凝土构件都有配筋,验算结果表明各构件承载能力满足要求。三维有限元分析结果能较直观、准确反映建筑物整体强度与位移状况,可以为评价结构安全性态提供依据。

Aimed at the complex problems of Huaishu lock head structure, the three-dimensional FEA soft-ware ABAQUS is adopted to analyze the displacement field and stress field of the lock head structure under different working conditions. In this paper, the calculation result shows that the horizontal and vertical displacement all meet the specification requirement;the tensile stress exceeds the allowable tensile stress of concrete;the carrying capacity of all parts of lock head structure meets the requirement after reinforcement. The results of three-dimensional FMA can accurately and intuitively reflect the state of overall strength and displacement of buildings and lay the foundation for the evaluation of the structure security state.